Implementing a Symfony constraint based on this library

[johanwilfer]

We have been using this great library for a while now, and I have begun to extract some code we have in a few classes for this to something more generic and useful. Today we are using Symfony and a callback validator, but I am extracting it into a separate class like described here: https://symfony.com/doc/current/validation/custom_constraint.html

Would a PR be welcome with this functionality? Any pointers on how / where you like it?
I am thinking it will take a string input like this SE12345678901 and do the validation using this library.

[DragonBe]

As mentioned in the README, there is already a Symfony bundle available. See MyOnlineStore ViesBundle.

[johanwilfer]

Ah, I missed that. Thanks! Will close this and make a PR for that library instead then.